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An interesting article in this month's Scientific American arguing against the "Man hunts, Woman nurtures" view of early humans.
It's also interesting as it deals with XY vs XX musculature and the effects of estrogen on types of musle fibre
https://www.scientificamerican.com/article/the-theory-that-m...
Hunters
In African Lions, the female is the hunter. The male often takes his share of the kill from them.
Quote Without Comment...
Mazen J. Hamadeh of York University and his colleagues found that males supplemented with estrogen suffered less muscle breakdown during cycling than those who didn't receive estrogen supplements.